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The Goodman B1392139 View Port Bushing is a genuine OEM fitting for the burner observation window on the AMS80403AXAA gas furnace and compatible Goodman and Amana models. This small but important component holds the sight-glass / view port in place, allowing technicians to safely inspect the burner flame during service while sealing the opening against air and flue gas movement. A missing or degraded bushing can loosen the view port and disturb combustion airflow.
The OEM B1392139 is molded to the precise diameter of the AMS80403AXAA view port so it snaps in securely and seals cleanly. Generic grommets rarely match the exact bore and can fall out or leak. Given the low cost, the genuine OEM part is the obvious choice.
Rated Easy — a tool-free push-in replacement that takes only a few minutes. Turn off power and gas before opening the burner compartment. Consult a professional if you are unfamiliar with the assembly.